Merge date formatting from pull request #90
More date stuff
changed reflection hints for ExcelBook::__constrcut(), reformat ChangeLog, updated ExcelBook docu
Merge branch 'master' of https://github.com/johmue/php_excel into johmue-master

Conflicts:
	ChangeLog
	excel.c
Compiler warning fixes
Merge remote-tracking branch 'origin/master'